Investigators believe Hickson shot Leonard Hugh Richardson, 27, in front of his mother in a Dairy Queen parking lot in the 3400 block of Rosemeade Parkway near Marsh Lane on the evening of May 25.

Police said Richardson parked his vehicle in the lot just before 7:15 p.m., possibly to go to a nearby apartment complex. He observed a dispute among some people already in the lot and apparently tried to defuse the situation.